Shrinking a Pattern

I want to make my own sampler quilt. I do not have EQ7 yet (not till after christmas). So I was wondering, if I have a pattern and it makes a 12" block, can I divide the measurements in half and end up with the 6" block I want? Maybe I am being too simplistic this time, but normally I over think things so going with the simple approach first. I am not in a big rush so if its not this simple, I will just wait till I get my EQ7, rather than spend the time on the math (yes lazy i know).

In general, no, you can't just cut the measurements in half. For cutting fabric, you can (1) subtract 1/2" for seam allowances, (2) cut the measurement in half, and (3) add back in the 1/2" seam allowance, but this only works for rectangular patches, not for triangles or other shapes.

i know (in our minds) it should work- but it really does not- you do have to first subtract the seam allowance- then divide- then add it back in- and here's an example to show you why---
say you have a 5 1/2" (unfinished block)
divided in half = 2 3/4 {5.5 / 2 = 2.75}
when you remove the seam allowance first you have a 5" block- divided by 2 = 2 1/2" + 1/2" seam allowance- block size is 3" {5" / 2 = 2.5 + .5 = 3"} your block would not come out right if you cut 2 3/4" instead of 3"---you have to remove the seam allowance first- do the math- then add it back in like Dunster said.

Thank you. I figured it wouldnt be just a "divide and conqueor" type of thing since the seam allowance issue kept bothering me too, but I overthink things usually and figured I would ask before I started wacking away at fabric.

Since the sampler quilt is not even planned out yet (I dont even know which blocks and what fabrics I will be using), I'll just hold off for a couple of months. I havee plenty of other projects both sewing and non-sewing to keep me busy till next Christmas, much less this one.

Thank you all again. Everyone is always so helpful and quick to respond.